c. What is the mass (in kg) of 2.1 mol of ethanol?

When 4.69 g of ssulfur combines with flourine, 15.81 g of gas is produced. a. what is the empirical formula of the gas? b.assuming that the empirical and molecular formulas are the same, what is its name?

3. In Hubei China, Ten hospitals were used to do a trial for Remdesivir drugs. Patients age 18 and above was admitted with a laboratory confirmed SARS COV 2 infection. Patients were assigned to intake 0.20 g of Redmesivir on the first day and followed by 0.10 g on the following days. How much molecules of Remdesivir was used on the first day? A. 1998 x 1018 molecules of C27H35N6O8P B. 1998 x 1019 molecules of C27H35N6O8P C. 1998 x 1020 molecules of C27H35N6O8P D. 1998 x 1021 molecules of C27H35N6O8P

I need help with the balanced chemical equation

The great French chemist Antoine Lavoisier discovered the law of conservation of mass in part by doing a famous experiment in 1775. In this experiment they found that mercury(II) oxide, when heated, decompose into liquid mercury and an invisible and previously unknown substance: oxygen gas. A. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury (II) oxide (HgO) into liquid mercury and gaseous dioxygen. B. Suppose 72 mL of dioxygen gas are produced by this reaction, at a temperature of 120°C and pressure of exactly 1 atm. Calculate the mass of mercury (II) oxide that must have reacted in grams. Round your answer to three significant digits.

Consider 11.5 g Na2SO4.a. Determine the number of moles of Na2SO4. b. Determine the number of Na + ions. c. Determine the mass percentage of SO –2 ions.

4.62 g sample of methane (CH4) is reacted with 15.1 g of oxygen. What is the maximum amount of water (theoretical yield) which could be formed?

1. What mass of BaSO4 can be formed from 196.0 g of H₂SO₂? BaSO4(s) BaO (s) + H₂SO4 (aq) - + H₂O

The concept of determining which reactant is limiting and which is in excess is akin to determining the number of sandwiches that can be made from a set number of ingredients. a. Assuming that a cheese sandwich consists of 2 slices of bread and 3 slices of cheese, determine the number of whole cheese sandwiches that can be prepared from 32 slices of bread and 57 slices of cheese. b. Which of the two ingredients limits the number of sandwiches that can be made: slices of bread, or slices of cheese? c. What quantity of the ingredient in excess remains?

Solid lithium hydroxide is used to remove exhaled carbon dioxide from space vehicles by forming lithium carbonate and liquid water. What mass of carbon dioxide can be absorbed by 86.20 grams of lithium hydroxide?